Printing process and apparatus therefor



July 24, 1928 Y 1578,49? I J. M. COOPER PRINTING PROCESS AND APPARATUS THEREFOR Filed Oct. 25, 1925 :2 Sheets-Sheet Fig.1.,

Hi? lwi Fi INVENTGR J. M. COOPER PRINTING PROCESS AND APPARATUS THEREFOR July 24, 1928.

Filed Oct. 25, 1925 2 Sheets-Sheet 2 Fig.3.

Patented July 24, 1928.

UNITED STATES JEHANGIR-MANECKJI QQOPER, OF BOMBAY, INDIA.

PRINTING PROCESS AND APPARATUS THEREFOR.

Application filed October 25,1923, Serial No. 670,632, and in Great Britain October 28, 1922. v

in which the material is printed at the point of contact with a metal ink-carrying cylinder or roller with a plain surface over which the ink is evenly distributed, the pattern being in relief on the surface of another roller pressing against the reverse side of the material.

The present invention comprises a printing process in which the design or pattern is first formed in a film of ink or colour on a lain,-smooth, hard surfaced roller covered all over with a thin film of ink or colour, and then transferred from this plain surface to the material to be rinted by passing this material under suitab e pressure between this plain surface and another plain roller preferably with a smooth, resilient surface.

The invention willbe fully described with reference to the accompanyim drawings.

Fig. 1. Sectional elevation of machine more adapted for printing according to the invention with water colours or dyes.

- colours.

Fig. 2. Diagrammatic section showingmachine more adapted for printing with 011 Fig. 3. Sectional elevation similar to Fig. 1 illustratin the use-ofan air brush for applying an a 'ditional colour.

The apparatus adapted to operate the process is constructed with a bar metal cylinder or roller A with a plain, s 00th, hard surface, over which a film of co our "or ink is evenly distributed by suitable means. A second cylinder or roller B, preferably of resilient material such as rubber or compo-.

sition with a lain, smooth, resilient surface rotates with t e cylinder or roller-A and is pressed against it by a lever C and weight W or by a screw, eccentric, spring, or other means.

The ink or colour is distributed evenly in a film of even thickness over the surface of the cylinder or roller A by any known means, such as by a number of inking rollers d d from an ink container D (Fig. 2), or by a roller D pressed against the cylinder A (Fig. 1), as described and claimed in my application filed Oct. 26, 1923, Serial No.-

- 67 0,831. According to this latter method of applying the film of colour a body of colouring liquid D is supported between the coacting revolving rollers A and D roller A being a printing roller, and roller 1) serving to squeeze a portion of the colouring liquid D into a thin film which is carried along on the surface of the printing roller A. The deslgn or pattern to be printed on the material E is formed or traced in the film of ink on the surface of the hard-cylinder or roller A by any known means, such as by dabbingsomething against the ink, or

by holding a comb or brush against it, or by a a roller F with a pattern which will lift or absorb or remove part of the ink, or by a revolving brush or reciprocating comb applied mechanically or by hand. The pattern roller F may be an engraved roller of gelatine, rubber, wood, or even metal, or it may be a plain roller covered with lace or the like, or with an absorbent-material. With a pattern roller such as F a wiper roller f may be applied to remove colour that may accumulate thereon.

To produce a multi-colour effect, one or more-air brushes may be set to spray any desired colour or colours onto the even or uniformfilm previously applied to the surface of roller A, as above described. Such an arran ement is illustrated in Fig. 3 wherein an air rush H is provided for applyin additional colour in the form of a spray onto the uniform film of colour previously applied to the surface ofroller A from the pool of colourng liquid D It will be understood that the air brush H may be manipulated by the hand of the operator, or motion may be otherwise imparted thereto, for the purpose;

of applying the spray in such away as to form a desired pattern, such, for example, as amottled' effect.

In certain cases the preliminary uniform film of colour on the roller A may be entirely dis ensed with, and, instead, one or more air rushes may be arranged to spray the colour on roller A, thus obtaining certaintypes of eifec t which may be transferred onto the rinting material in the manner described a ove. In place of spraying, dubbing also may be resorted to to give mottled or marble effects.

The process of this invention is also carried out by printing the negative or reverse pattern from the ink carryingcylinder a described in my atent above referred to. i

As previous y mentioned the design or pattern of ink or colour which has been 1 of the various ways just described is transferred to the material to be printed by passing this material between the surface of roller A holdin the design and another plain surfaced r0 ler. The roller A in both Figs. 1 and 2, as has been seen, revolves in the counter clock-wise direction, and the surface-of this roller after leaving roller F contains in ink or colour the design or pattern to be printed. The rotation of roller A brings this portion of its surface continu-v ously into contact with the web E of material to be printed as it is fed by the rollers A and B. The rollerB which preferably has a resilient surface presses the material to be printed against the roller A and causes the pattern or desigmto be printed on the side of the web which contacts with roller A by the transference of the ink or colour which has been arranged on the surface of this roller in the form of the design.

The roller A continuin its counter clockwise revolution carries the surface thereof which has operated upon the web E past the scraping devices G where any excess colour, remaining after the printing operation, is removed. Ink or colour which is removed by the scraping device Gis' collected in vessels g. The surface of roller A after it has passed the scraping device is left clean'ready for another application of the film of ink or colour.

What I claim as new and desire tosecure by Letters Patent of the United States is:-

1. The process of printing designs or the like upon paper, cloth, or other material, which comprises, maintaining a body of colouring liquid at a fixed point in contactwith the surface of a revolving printing roller, allowing a thin film of said li uid to be carried along with the rollr, mo ifyingsaid film to form a desired design to be printed, and transferring the modified film to the material to be printed.

2. The process of printing designs or the like upon paper, cloth or other material, which comprisesfisupporting abod of coloring liquid at a xed point upon t e surface of a revolving. printlng roller, allowing a thin film of said 'li uid to be carried along with the roller, mo lfying said film to form a desired design to be printed, and transferring the modified film to the material to be printed.

3. The process of printing designs or the like upon paper, cloth or other material, which comprises, supporting a body of 'colorin liquid between a pair of coacting revo ving rollers one of which is a rinting roller, allowing a portion of said liquid to be squeezed into a thin film by the coaction of said rollers onto the surface of the printing roller and carried along with said which comprises, maintaining like upon paper, cloth, or other material which comprises, applying a uniform film of colouring liquid to a printing roller having a smooth, hard surface, adding to the said film colouring liquid to produce a desi n, and passing the material to be printed etween said printing roller and a pressure roller.

5. The process of printing designs or the like upon paper, cloth, or other material, a body of colouring liquid at a fixed point in contact with the surface of a revolving printing roller, allowing a thin film of said liquid to be-carried along with the roller, aptfilying additional colourin liquid to said In to form the desired esign, and passing the material to be printed between said printing roller having colouring liquid thus applie thereto and a pressure roller.

6. The process of printing designs or the like upon paper, cloth, or other material, which comprises, maintaining a body of colouring liquid at afixed point in contact with the surface of a revolving printing roller, allowing a thin film of said liquid to be carried along with the roller, spraying additional colourin liquid onto said film to form the desired e'sign, and passing the material to be printed between the printing comprising, a printing roller having a hard surface, a roller coacting theresmoth' with for maintaining a pool of color in continuous contact with the rinting roller and for squeezing a portion 0 said color between said rollers nto a film of substantially uniform thickness on the surface of the printing roller, means for modifying said film for producing designs on the said printing roller, a pressure roller coo erating. with said printim roller, and having a smooth, resilient surface, and means for feeding the material to be printed between said printing and pressure rollers.

In testimony whereof I aflix my signature.

JEHANGIR MANECKJI COOPER. 

